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Antenna unit for use in navigation system

  • US 5,757,327 A
  • Filed: 07/27/1995
  • Issued: 05/26/1998
  • Est. Priority Date: 07/29/1994
  • Status: Expired due to Term
First Claim
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1. An antenna unit for use in a navigation system comprising:

  • a bottom cover;

    a unit case connectable to said bottom cover;

    a circuit board and an antenna main body positionable in said bottom cover, wherein said bottom cover and said unit case comprise a continuous enclosure case for preventing ingress of contaminants,said bottom cover including a cylindrical storage portion for receiving said circuit board, and said antenna main body, said cylindrical storage portion being formed integrally with said bottom cover, said cylindrical storage portion including a first surface having first threads,said unit case having a cylindrical joint portion including a second surface having second threads, wherein said first threads are connectable with said second threads, said cylindrical joint portion being formed integrally with said unit case,said antenna unit further comprising a waterproof seal positioned between said cylindrical storage portion and said cylindrical joint portion for sealing said cylindrical storage portion.

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